| 赵宏亮,石明国,宦怡,等.先心病双源CT血管造影前瞻性序列扫描与大螺距扫描的对照研究[J].中华放射医学与防护杂志,2013,33(5):555-558.ZHAO Hong-liang,SHI Ming-guo,HUAN Yi,et al.Comparison of prospective sequence acquisition mode and Flash mode for DSCT angiographic diagnosis of congenital heart disease[J].Chin J Radiol Med Prot,2013,33(5):555-558 |
| 先心病双源CT血管造影前瞻性序列扫描与大螺距扫描的对照研究 |
| Comparison of prospective sequence acquisition mode and Flash mode for DSCT angiographic diagnosis of congenital heart disease |
| 投稿时间：2012-12-07 |
| DOI：10.3760/cma.j.issn.0254-5098.2013.05.028 |
| 中文关键词: 先天性心脏病 体层摄影术 图像质量 辐射剂量 |
| 英文关键词:Congenital heart disease Tomography Image quality Radiation dose |
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| 中文摘要: |
| 目的 对比分析婴幼儿先心病双源CT(DSCT)前瞻性心电触发血管造影中,Flash(大螺距扫描)与序列扫描两种模式的辐射剂量和图像质量。方法 60例临床拟诊先天性心脏病并进行DSCT前瞻性心电触发扫描的患儿纳入研究并随机分为2组,A组30例采用Flash扫描模式, B组30例采用序列扫描模式。比较两组容积CT剂量指数(CTDIvol)、剂量长度乘积(DLP)、有效辐射剂量(E)以及CT图像质量,并以手术或心脏造影(DSA)结果为标准,比较两组诊断符合率。结果A、B两组CTDIvol分别为(0.32±0.10)和(1.40±0.43)mGy(t=13.32,P<0.05); DLP分别为(6.46±1.92)和(17.91±4.80)mGy·cm(t=7.97,P<0.05);E分别为(0.19±0.05)和(0.45±0.12)mSv(t=16.64,P<0.05);图像质量评分分别为(4.03±1.15)和(3.13±1.38)(t=3.55,P<0.05);A、B两组总诊断符合率分别为100%和93%,差异无统计学意义;但A组畸形检出率(91%)高于B组(75%)(χ2=7.72,P<0.05)。结论 在婴幼儿先心病DSCT血管造影中,采用Flash扫描模式时畸形检出率高于序列模式,且有效辐射剂量降低。 |
| 英文摘要: |
| Objective To compare radiation dose and image quality of prospectively ECG-triggered sequence acquisition mode and Flash(high-pitch spiral acquisition)mode in DSCT angiography of children with congenital heart disease. Methods Sixty children with clinically suspected congenital heart disease and undertook DSCT prospectively ECG-triggered scan were enrolled in the study and randomly divided into two groups. The Flash mode and prospective sequence scanning mode were applied in group A and B, respectively. The CT dose index (CTDIvol), dose length product (DLP), effective dose (E), and image quality were compared between two groups. Refered to surgery or cardiac angiography (DSA), the diagnostic coincidence rates were compared between two groups. Results The CTDIvol in group A and B was (0.32±0.10) and (1.40±0.43)mGy(t=13.32,P<0.05), respectively. The DLP was (6.46±1.92) and (17.91±4.80)mGy \5cm(t=7.97,P<0.05). E was (0.19±0.05) and (0.45±0.12)mSv(t=16.64,P<0.05). The image quality score in group A (4.03±1.15) was higher than that in group B(3.13±1.38) (t=3.55,P<0.05). The total diagnostic coincidence rates were 100%(A) and 93%(B). But the deformity diagnostic coincidence rates in group A (91%) was higher than that in group B (75%)(χ2=7.72,P<0.05). Conclusions In DSCT diagnosis of congenital heart disease in children, using flash scan mode can reveal more cardiac deformities than using prospective sequence scanning mode, and could reduce the radiation dose. |
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